After riding this past weekend, my son and I spent about an hour or so checking every fastner, bolt, screw and continued to loctite them. After checking the quad out, I can report that everything seems fine to this point. This weekend I hope to put a few more hours of riding time on this quad...stay tuned!

 

I wish us luck mustangman, I just bought a 2006 2006 SUNL 125cc TRANSPORTER X4 ATV AUTO NEWEST MODEL from atvdiscounter on 8-12-06. It took a week to get it, 8-18-06. My 2 kids started riding it on saturday the 19 and it all went fine. Sunday it wouldn't start, just a click. I had juice to the starter so I pulled it and its burnt up. They exhaust also came loose which blowing on the started might have helped get it hot. One good thing I contacted atvdiscounter and the new starter came in the mail today. I think I'll get a new battery the one that came with it won't hold a charge. I've had it for a week and its only been broke down now for 5 days

 

mustangman

From the symptoms you describe I don’t think you have any problems with your transmission or your clutch. The transmission is a standard manual transmission with real gears that would not be affected by heat. The clutch in a semi-auto is a centrifugal clutch and if it were failing because of heat or any other reason, the symptom would be the engine would rev but the ATV would not go faster (clutch slipping). It sounds like the engine is just overheating and losing power, much more apparent in higher gears. The number one reason an engine overheats is because it is running lean (too much air or not enough fuel). Running lean can be caused by a misadjusted carb, dirt or something in a jet (inside the carb), or a leak or crack in the intake manifold. 2manytoys did a good how-to on how to adjust the carb found here HOW TO carb adjustment on any Chinese atv. To check for an intake manifold leak you can use starter fluid or carb cleaner, just spray around the intake manifold while the ATV is running and listen for the engine to rev up. If the engine is running lean and overheating you want to try to get it fixed soon, it will damage the engine sooner or later.

 

Thanks for the info 9kids. I have adjusted the carb but will check it again. I do think though that the clutch was slipping somewhat because I could rev the engine but it did not have any get up and go mainly in 3rd gear. It was fine in 1st but seemed to loose some power in 2nd and more in 3rd. I know that my son was shifting too soon and not giving it more throttle after he shifted. The engine/trans was working hard to go up the small hills as a result of this. I will check the carb but hopefully this is a non-problem once my son gets more comfortable riding the quad. I did notice in a manual that my friend has for his chinese quad that it states to not run the quad for more than 45 minutes and then let it cool down for 10-15 minutes.

Tha's a bummer jerryolip! Glad to hear that you got support and parts quickly. I guess you need to check all the bolts/fastners and use some loctite. I went through my whole quad and used loctite on every bolt/fastner. I also check the whole quad after each time my son runs it. Takes about an hour but is worth it in terms of making sure it is safe to ride and nothing is going to fall off. Make sure you get the loctite that is rated for high tempature for those exhaust manifold bolts. So far I have had no problem with the battery. Good Luck to both of us!